1 files changed, 51 insertions, 0 deletions
diff --git a/ruby_1_9_3/ext/psych/lib/psych/visitors/emitter.rb b/ruby_1_9_3/ext/psych/lib/psych/visitors/emitter.rb
new file mode 100644
index 0000000000..c886e5092e
--- /dev/null
+++ b/ruby_1_9_3/ext/psych/lib/psych/visitors/emitter.rb
@@ -0,0 +1,51 @@
+module Psych
+  module Visitors
+    class Emitter < Psych::Visitors::Visitor
+      def initialize io, options = {}
+        opts = [:indentation, :canonical, :line_width].find_all { |opt|
+          options.key?(opt)
+        }
+
+        if opts.empty?
+          @handler = Psych::Emitter.new io
+        else
+          du = Handler::DumperOptions.new
+          opts.each { |option| du.send :"#{option}=", options[option] }
+          @handler = Psych::Emitter.new io, du
+        end
+      end
+
+      def visit_Psych_Nodes_Stream o
+        @handler.start_stream o.encoding
+        o.children.each { |c| accept c }
+        @handler.end_stream
+      end
+
+      def visit_Psych_Nodes_Document o
+        @handler.start_document o.version, o.tag_directives, o.implicit
+        o.children.each { |c| accept c }
+        @handler.end_document o.implicit_end
+      end
+
+      def visit_Psych_Nodes_Scalar o
+        @handler.scalar o.value, o.anchor, o.tag, o.plain, o.quoted, o.style
+      end
+
+      def visit_Psych_Nodes_Sequence o
+        @handler.start_sequence o.anchor, o.tag, o.implicit, o.style
+        o.children.each { |c| accept c }
+        @handler.end_sequence
+      end
+
+      def visit_Psych_Nodes_Mapping o
+        @handler.start_mapping o.anchor, o.tag, o.implicit, o.style
+        o.children.each { |c| accept c }
+        @handler.end_mapping
+      end
+
+      def visit_Psych_Nodes_Alias o
+        @handler.alias o.anchor
+      end
+    end
+  end
+end